1、Power: DC current welding machine can be used for air-arc gouging carbon electrode rod DC power supply.
2、Range of currency:The currency range adopted directly influences the processing quality and results. If it is too small, it will be difficult for gouging; If it is too large, it will cause heated carbon head too long, which will lead to the rod thinner and the processing quality poor. Therefore we should select the current range shown in the table in accordance with the carbon rod type.
3、Range of air pressure: The general choice of wind pressure range is 4-6kg / cm2 wind pressure, which shall be in compliance with the diameter of gouging carbon electrode. In general, higher air pres-cure choose bigger diameter of the rod. Lower pressure is suitable for smaller diameter. If air pressure is too high, electrical arc is unstable; If it is too low, melted metal can not be blew off easily, which will influence the quality of gouging groove.
